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Unrrnn Srrrrne @rrren rnocess or nmnurAcrnni BRGOKLY N, NE: Y (Hi-K.

MG 'ARTiFiCiAL FER'i'iLIZERS.

Application filed November 14, 1852. (So specinxena) To a lZ whom iii-may concern:

Be it known that I, EDWIN A. SCRIB'NER, a citizen of the United States, and a resident of Brooklyn, iu'the county oi Kings and State of 'New York, have invented. eertai u now and usei'ul Improvements in jiroeesson oi? i iitnnfaet-ur- 111g Artificial Fertilizers, of which the i'ollow ing is a specification.

My invention relates to nwthods of treating phosphatie rock for the produeii'tm there'l'roin of artificial na'tilizers.

The ohjet-t oi" the PiOt'ftHS whit-h constitutes my present invention is to render mnilablo a larger proportion of {he itwtilizing principle contained in the rorl; than has been heretofore done, or, in other words, to obtain an increased propori ion of phosphoric acid from ih'e same in a eonditiou suitable for mixing with amnioninenl or other mattern in the pro fluetion of fertilizers.

Ilierotoibre in the i r :u in in of t.l1 s('sniineral phosphates the ]llili(liiii has usually noon caicined Olt'MlSEWii, and ihnn t-oiniiiued ii sulphuric or other acid, whilev in inan x 'instannes other-substanceshave linen added,:un'ithe (011 pounds milijeeil-d in various treatments in order to obtain i'air rrsulis. Over these pro oessesniy present invention isaniinprm'einnnt, the procesn \Yllll'il l have discovered lining not only more w-ononriral, lint yiol'ding a very much largerpercentageol'phosphatie niatern l.

in condition known in ilinart as reverted -or available? Broadly slated, my inrrniion consists in niniultaneouslyimposing the phospliatie ronl; to the action of applied heat. and pure sulphur, or its equivalents nnt-h as sulphur-nus anhydride and in another amiliratiou I haw described and elainnril a nn-ihod of carrying out this process by i'uaslilig the ground mineral withasinall ;l(il11i.\'ilil'l ol'granulat-zwlsulphur, ihiothernnj-i lmil llinrurnrrll by nunl. effecting; the same rnsnl'is to grind and roast the mineral, anilto inirnllurn in it, while hot, ihe sulphur in ilie roniiiiion oi vapor. or ns snl-- phurous anlrulrieln. and \Yiiii iillh. method my present appliraiion in more parlivuiarly ('mnrernotl.

The following isa (inscription oltlze prooessc Any (ii-sired. quaniilyof lliliitliiiliitli; rork-- Hill'il as is (omnnmiy known as phosphate of iron and zl-ll1l11i1l&-1S first. crushed or ground and brought to a high temperature. It is desirable to employ for this pnrposezi closed retort of any Ot'tilllfllfi' construction, in order thatas much as possible oi the sulphur vapor or sulphurous i'uines subsequently introduced may be sa 'ed by sublimation. In a separate reeeptaele sulphur vapor or .snlphurous. anhydride is produced by the heating or burning of sulphur, or compounds containing the sumo-such as iron 1);; ites and the vapor or fumes are forced illttftiifl retort containing the mineral while the la-titeris roasting. By the aetion of heat, water is dissociated from theininerni, and by the olieiniral reaction resulting from the'hoat and the mixing oi the vapor of Water and the vapor of sulphur or snlphurous zrnhydride sulphurons acid is i'oriued, which, noting on the mineral, produres a large proportion of nvniinbio phosphate. of phosphate of iron and'aluinina suiiioient Water is contained in the mineral itselfto prodnoe therequisite ehoinieaii reaetiou. Certain other substances, ilO\VCVOl'Sll(il as the phosphate of lime eontnin little or no water in theircomposition, and in these eases the deiieieney may be supplied by introducing; into the heated retort 'a-jet of steam along with the Sn] phur vapor.

in order that the notion of the vapor of sulphur jllfify' reaeh all portions of the mineral, the latter is agitated during the time that tin; vapor is introduced. This may he done by slirri the mass or revolving the reeoptaele in which. it is el'intnined.

"ihe roasting and admission of -vapor are to be carried on simultaneously, and mute must. be

i.- noin the ease ialcon ihat ihe water. contained in the mineral in not driven ol't'imiore the vapor is introduced,

I GO

2 v ess ew mereielly valuable fertilizing compound, c0nl mining a large percentage of available ph0sphorie acid. It may then, Without further trezitnientflae mixed with potash 0r mnmen'iacal imitters, as is usually done in the manufacture of these substances.

Having now describedmy invention; what I claim is 1 11.. The preeess herein described of menulnetnring iertilizing compounds from mineral plmsphutes, which consists in grinding and roasting the pilOSl'fllfltoS, and lbreiug through the mineral, while wasting, the vapor of sulphur orsulphurous' anhydride, as and for the purpose svb forth.

separate *reeeptaelq and forcing the same through the roasting mineral, as iseb forth In testimony whereof I have hereunto set my hnnll' this 11th day of November, 1882.

El'YWlN. A. SPRIBNER.

Witnesses:

PARKER 5'. PAGE, W. Fmsm'". 

